William p



NED STATES PATENT OFFICE.

WILLIAM P. MCCONNELL, OF WASHINGTON, DISTRICT OF COLUMBIA.

SPARK-EXTINGUISHER.

Specification of Letters Patent No. 1,892, dated December 10, 1840.

T all lwhom t may concern Be it known that I, WILLIAM P. MGOON- NELL, ofthe city of 7Washington, in the District of Columbia, have invented anew and useful Apparatus to Prevent the Escape of Sparks from Chimneysof Locomotives and other Engines, which is described as follows,reference being had to the annexed drawings of the same, making part ofthis specification.

Figure l is a longitudinal section. Fig. 2 is a transverse section.

Similar letters refer to similar parts in the figures.

This improvement consists in placing a circular case A in the outer endof the smoke box L or framing, the end of the smoke box similar to a fancase, in which is placed a revolving fan B, from the circumference ofwhich extends a conducting pipe c, which after rising to a sutlicientheight is bent at right angles and extended horizontally a suthcientdistance and then bent or turned downward at right angles a suitablelength and passed through a horizontal perforated plate D which lowerend forms the outlet of said pipe. The vessel E is circular and placedbelow said horizontal plate, it is made to contain water and has twooutlets N N, with each a stop cock, to let ofll the water from thevessel. The outlets pass down outside of the smoke box. Between theperfo-rated plate D and vessel E at a suflicient distance from each ofthem an inclined circular rim K of metal is attached to the inside ofthe outer vessel G. The sparks and dust striking which are forced by theinclined sides of the rim to 'fall into the vessel beneath. The vessel Eis surrounded by the cylindrical vessel Gr which is covered by theperforated plate D and has fitted to it above a hollow cylindrical capand vertical pipe or an inverted funnel or chimney I in which isconducted the steam pipes J J to be described. A space is left betweenthe vessel E and the inside of that of G for the sparks and dust as theyflow over from F to fall into and to be carried by the tubes H H whichproject downward from G and are either placed before or behind the pipesN N before described. The smoke passing from the furnace in the usualmanner enters the fan box by means of the aperture M Fig. l to whichitis conducted by a trunk T when by putting the fan in motion a partialvacuum is created, the fan is put in motion by a rotary engine or anyconvenient means, the smoke and sparks are driven up the conductor C andinto the reservoir of water E-which arrests the sparks and dust and thesmoke rises through the perforated plate D into the chimney I andescapes into the atmosphere. When the vessel E is full the sparks flowover into the space F and carried o downward by the tubes H H. The twosteam pipes J J are connected with the cylinder at one end and enter thefoot of the chimney I at the other. The ejection of steam from the mouthof these pipes into the chimney rarefies the air and causes the currentof smoke to pass more freely from the reservoir and greatly assists themovement of the fan which I consider a valuable part of my invention.

The water is supplied to the vessel E through any suitable tube anddrawn off through tubes N N before described furnished with thenecessary stop cocks. The fans arev constructed in pairs each pair withAonly one arm and that placed next to the rotary engine so as to leavean o-pen space next the opening inthe end of the case for the freeadmission of the smoke and sparks which will create a strong draft.

What I claim as my invention and which I desire to secure by LettersPatent is l. rI he employment of a fan in the flue of a furnace fordrawing the smoke and sparks from a furnace and throwing them into areservoir of water above whichV the due terminates, in combination withthe employment of one or more sets of exhaust steam tubes in a chimneyplaced over said reservo-ir and communicating with the space above thesame where the flue terminates by means of a perforated platethe wholebeing constructed arranged and operating substantially in the manner setforth.

2. I also claim the manner in which the reservoir of water is combinedwith the flue c and chimney I of the locomotive. Said chimney havingpipes for ejecting the exhaust steam as set forth by arranging thereservoir within a case covered by a per forated plate the flue of thefurnace terminating below said plate and placing the chimney I andexhaust tubes above said case so that the connection between the draftof the `flue and chimney shall be carried on through the perforatedplate described.

WM. P. MCOONNELL.

Witnesses:

Trios. H. DEWITT, E. MAHER.

